JPH025053Y2 - - Google Patents
Info
- Publication number
- JPH025053Y2 JPH025053Y2 JP1984013585U JP1358584U JPH025053Y2 JP H025053 Y2 JPH025053 Y2 JP H025053Y2 JP 1984013585 U JP1984013585 U JP 1984013585U JP 1358584 U JP1358584 U JP 1358584U JP H025053 Y2 JPH025053 Y2 JP H025053Y2
- Authority
- JP
- Japan
- Prior art keywords
- monolithic
- case
- catalyst
- annular recess
- monolithic catalyst
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000003054 catalyst Substances 0.000 claims description 70
- 239000000969 carrier Substances 0.000 claims description 17
- 230000003197 catalytic effect Effects 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 238000005452 bending Methods 0.000 description 9
- 239000007787 solid Substances 0.000 description 5
- 150000002611 lead compounds Chemical class 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Exhaust Gas After Treatment (AREA)
Description
【考案の詳細な説明】
本考案は主として車両用エンジンの排ガス浄化
用多段型モノリス触媒コンバータに関するもので
ある。[Detailed Description of the Invention] The present invention mainly relates to a multi-stage monolithic catalytic converter for purifying exhaust gas of a vehicle engine.
従来、縦割り可能な触媒ケース内に、目の荒
い、セラミツク製等の第１モノリス触媒担体と、
目の細い、セラミツクス製等の第２のモノリス触
媒担体とを縦列して収容担持し、前記第１のモノ
リス触媒担体によつて、主として鉛化合物等の固
形有害成分を濾過除去し、第２のモノリス触媒担
体によつて主としてHC，COおよびNOx等の気
体有害成分を酸化、および還元除去するようにし
て、排ガスを清浄化するようにした、多段型モノ
リス触媒コンバータが知られている。 Conventionally, a first monolithic catalyst carrier made of coarse ceramic or the like is placed in a vertically splittable catalyst case,
A second monolithic catalyst carrier made of fine-mesh ceramics or the like is housed and supported in tandem, and the first monolithic catalyst carrier mainly filters and removes solid harmful components such as lead compounds. A multistage monolithic catalytic converter is known in which exhaust gas is purified by oxidizing and reducing harmful gaseous components such as HC, CO, and NOx using a monolithic catalyst carrier.
ところでこのような触媒コンバータでは、第
１、第２のモノリス触媒担体をそれぞれ長手方向
に遊動しないようにしつかりと保持させ、さらに
第１のモノリス触媒担体を通過した排ガスに乱流
を積極的に生起させて第２のモノリス触媒担体に
流入させ、排ガスと該第２のモノリス触媒担体と
の接触面を拡大させて浄化能率を高めるべく、縦
列される第１、第２のモノリス触媒担体間に、所
定の間隔を保たしめるようにしており、そのため
に従来では、縦割り触媒ケースの長手方向中間部
に環状凹陥部を形成し、該凹陥部により、触媒ケ
ース内に形成される肩部で、第１、第２のモノリ
ス触媒担体を軸方向に所定間隔を存して遊動しな
いようにしつかりと保持できるようにしている
が、このように触媒ケースの環状凹陥部を形成す
ると、該ケースの曲げ強度が低下するのを否め
ず、これを補強するためには触媒ケース全体を肉
厚に形成しなければならず、このようにするとコ
スト高になるばかりでなく、全体の重量増を招く
不都合がある。 Incidentally, in such a catalytic converter, the first and second monolithic catalyst carriers are held firmly so that they do not move in the longitudinal direction, and turbulence is actively created in the exhaust gas that has passed through the first monolithic catalyst carrier. Between the first and second monolithic catalyst carriers arranged in tandem, in order to increase the purification efficiency by increasing the contact surface between the exhaust gas and the second monolithic catalyst carrier, To maintain a predetermined spacing, conventionally, an annular recess is formed in the longitudinally intermediate portion of the vertically divided catalyst case, and a shoulder formed in the catalyst case by the recess is used to The first and second monolithic catalyst carriers are kept at a predetermined distance in the axial direction so that they can be firmly held so that they do not move. It is undeniable that the strength will decrease, and in order to reinforce this, the entire catalyst case must be made thicker, which not only increases the cost but also increases the overall weight. be.
本考案は上記実情に鑑みてなされたもので、コ
スト高や重量増を招くことなく触媒ケースの曲げ
強度を大幅に高めるようにした、構成簡単な多段
型モノリス触媒コンバータを提供することを目的
とするものである。 The present invention was developed in view of the above-mentioned circumstances, and the purpose is to provide a multi-stage monolithic catalytic converter with a simple configuration that significantly increases the bending strength of the catalyst case without increasing cost or weight. It is something to do.
そしてこの目的を達成するために本考案は、所
定の間隔を存して縦列される複数個のモノリス触
媒担体と、２つのケース半体を合掌結合して構成
され内部には前記モノリス触媒担体を収容担持す
る触媒ケースとよりなり、前記触媒ケースの長手
方向中間部には、相隣れるモノリス触媒担体間に
所定の間隔を保たしめるための環状凹陥部を一体
に形成してなる、多段型モノリス触媒コンバータ
において、前記環状凹陥部には、その環状凹陥部
の底面より外方に***して該環状凹陥部の相対向
する両内側相互を一体に連結する補強片を継ぎ目
無く一体に形成したことを特徴とする。 In order to achieve this objective, the present invention consists of a plurality of monolithic catalyst carriers arranged in tandem at a predetermined interval, and two case halves joined together, with the monolithic catalyst carriers inside. A multi-stage type comprising a catalyst case for accommodating and supporting a catalyst, and an annular recessed portion is integrally formed in the longitudinally intermediate portion of the catalyst case to maintain a predetermined distance between adjacent monolithic catalyst carriers. In the monolithic catalytic converter, the annular recess is seamlessly formed with a reinforcing piece that protrudes outward from the bottom surface of the annular recess and integrally connects both opposing inner sides of the annular recess. It is characterized by
以下、図面により本考案の一実施例について説
明する。 An embodiment of the present invention will be described below with reference to the drawings.
この実施例の多段型モノリス触媒コンバータ
は、第１、第２のモノリス触媒担体M1，M2、お
よびそれらを内部に縦列して収容担持する触媒ケ
ースＣとよりなる。 The multistage monolithic catalytic converter of this embodiment consists of first and second monolithic catalyst carriers M 1 and M 2 and a catalyst case C that accommodates and supports them in tandem.
前記第１のモノリス触媒担体M1はセラミツク
材により円柱もしくは楕円柱状に形成され、主と
して排ガス中に含まれる鉛化合物等の固形有害成
分を濾過除去するように比較的目が粗く構成され
る。また前記第２のモノリス触媒担体M2もセラ
ミツク材により円柱、もしくは楕円柱状に形成さ
れ、主として排ガス中のHC，COおよびNOx等
の気体有害成分を酸化および還元除去できるよう
に比較的目が細かい三元触媒として構成される。 The first monolithic catalyst carrier M1 is formed of ceramic material into a cylindrical or elliptical cylindrical shape, and has a relatively coarse mesh so as to mainly filter out solid harmful components such as lead compounds contained in the exhaust gas. The second monolithic catalyst carrier M2 is also made of ceramic material in the shape of a cylinder or an elliptical cylinder, and has relatively fine mesh so that it can mainly oxidize and reduce harmful gaseous components such as HC, CO, and NOx in the exhaust gas. Configured as a three-way catalyst.
次に前記第１、第２のモノリス触媒担体M1，
M2を縦列して収容担持する触媒ケースＣの構造
を説明する。 Next, the first and second monolithic catalyst carriers M 1 ,
The structure of the catalyst case C that accommodates and supports M 2 in tandem will be explained.
前記触媒ケースＣは、ステンレス等の耐熱金属
板よりそれぞれ成形される上、下一対のケース半
体Ch，Chを、その縦軸線Ｌ−Ｌに沿つて一体に
溶接結合して構成されており、中空筒状の胴部１
の前端に先細り筒状の前部接続筒２が一体に延設
され、またその後端に先細り筒状の後部接続筒４
が一体に接続される。前、後部接続筒２，４の
前、後端面には前、後部取付フランジ３，５がそ
れぞれ一体に結合され、それらの取付フランジ
３，５には、それぞれ複数本の取付ボルト６，７
が固着される。 The catalyst case C is constructed by welding together a pair of upper and lower case halves Ch, Ch each formed from a heat-resistant metal plate such as stainless steel along the longitudinal axis L-L, Hollow cylindrical body 1
A tapered cylindrical front connection tube 2 is integrally extended at the front end of the , and a tapered cylindrical rear connection tube 4 is provided at the rear end.
are connected together. Front and rear mounting flanges 3 and 5 are integrally coupled to the front and rear end surfaces of the front and rear connecting tubes 2 and 4, respectively, and a plurality of mounting bolts 6 and 7 are attached to these mounting flanges 3 and 5, respectively.
is fixed.
第２，３図に示すように前記一対のケース半体
Ch，Chの互いに接合される接合面には、それぞ
れ接合フランジ８，９がそれらの半径方向に出張
るように形成され、それらの接合フランジ８，９
を互いに合掌させ、それらを溶接することによつ
て触媒ケースＣが形成される。この場合前記接合
フランジ８，９は一対のケース半体Ch，Ｃの接
合面積を拡大してそれらの接合部の強度を高め、
特に接合フランジ８，９の接合面に沿う方向（２
図矢印ｙ方向）、すなわち車両への組み付け状態
において横方向に対する強度が高められる。 As shown in Figures 2 and 3, the pair of case halves
Joint flanges 8 and 9 are formed on the joint surfaces of Ch and Ch to be joined to each other so as to protrude in the radial direction.
The catalyst case C is formed by bringing the two together and welding them together. In this case, the joining flanges 8 and 9 expand the joint area of the pair of case halves Ch and C to increase the strength of their joints,
Especially in the direction along the joint surfaces of the joint flanges 8 and 9 (2
The strength in the lateral direction (direction of arrow y in the figure), that is, in the assembled state on a vehicle, is increased.
触媒ケースＣの胴部１の長手方向中間部には、
その全周に亘つて環状凹陥部１０が一体に形成さ
れる。これにより触媒ケースＣの胴部１内周面に
は、前記環状凹陥部１０の相対向する両内側面に
対応して二つの係止段部１１，１２が形成され、
これらの係止段部１１，１２は後述するように第
１のモノリス触媒担体M1の後縁および第２のモ
ノリス触媒担体M2の前縁を係止する。 In the longitudinally intermediate portion of the body 1 of the catalyst case C,
An annular recessed portion 10 is integrally formed around the entire circumference. As a result, two locking step portions 11 and 12 are formed on the inner circumferential surface of the body portion 1 of the catalyst case C, corresponding to both opposing inner surfaces of the annular recessed portion 10.
These locking steps 11 and 12 lock the rear edge of the first monolithic catalyst carrier M 1 and the leading edge of the second monolithic catalyst carrier M 2 as described later.
前記環状の凹陥部１０は、上、下のケース半体
Ch，Chにそれぞれ形成される凹陥半部１０ｈ，
１０ｈによつて形成されるが、各凹陥半部１０ｈ
の周方向中央部には、第３図に示すようにそれぞ
れの底面より外方向に山状に***する補強片１４
が継ぎ目無く一体に形成され、各補強片１４は、
各凹陥半部１０ｈの相対向する両内側面相互を一
体に連結することによつて触媒ケースＣの強度、
特に前記接合フランジ８，９の接合面に対して直
交する方向（第１図ｘ方向）、すなわち車両への
組付状態で上下方向の曲げ力に対する曲げ強度が
高められる。 The annular recess 10 is formed between the upper and lower case halves.
Recessed half portions 10h formed in Ch and Ch, respectively,
10h, each recessed half 10h
As shown in FIG. 3, a reinforcing piece 14 is provided in the circumferential center of each of the reinforcing pieces 14, which protrudes outward from the bottom surface in a mountain-like manner.
are formed seamlessly and integrally, and each reinforcing piece 14 is
The strength of the catalyst case C is increased by integrally connecting both opposing inner surfaces of each concave half portion 10h.
In particular, the bending strength against the bending force in the direction perpendicular to the joint surfaces of the joint flanges 8 and 9 (the x direction in FIG. 1), that is, in the vertical direction when assembled to a vehicle, is increased.
前述のように構成される触媒ケースＣの胴部１
前半部には、前記第１のモノリス触媒担体M1が、
環状の弾性保持部材１５を介して収容され、その
前、後部は胴部１の前壁１６と、前記環状凹陥部
１０によつて形成される係止段部１１とによりク
ツシヨリング１７，１８を介して係止され、第１
のモノリス触媒担体M1は半径方向および軸方向
に遊動しないように担持される。同じように触媒
ケースＣの胴部１後半部には、前記第２のモノリ
ス触媒担体M2が環状の弾性保持部材１９を介し
て収容され、その前、後部は胴部１の後壁２０
と、前記環状凹陥部１０によつて形成される、他
の係止段部１２とにより係止され、下流側の第２
のモノリス触媒担体M2はクツシヨンリング２１，
２２を介して半径方向および軸方向に遊動しない
ように担持される。 Body part 1 of catalyst case C configured as described above
In the first half, the first monolithic catalyst carrier M 1 is
It is accommodated via an annular elastic holding member 15, and the front and rear portions are interposed via cushion rings 17 and 18 by the front wall 16 of the trunk 1 and a locking step 11 formed by the annular recess 10. and the first
The monolithic catalyst carrier M 1 is supported such that it does not move in the radial and axial directions. Similarly, the second monolithic catalyst carrier M2 is housed in the rear half of the body 1 of the catalyst case C via an annular elastic holding member 19, and the front and rear portions are connected to the rear wall 20 of the body 1.
and another locking step 12 formed by the annular recessed part 10, and the second downstream side
The monolithic catalyst carrier M 2 has a cushion ring 21,
22 so as to prevent movement in the radial and axial directions.
また第２のモノリス触媒担体M2の後部外周と
胴部１間には、石綿、インテラム（登録商標名）
等の耐熱材料よりなる弾性シール部材２３が介装
されており、この弾性シール部材２３は触媒ケー
スＣの内面と第１、第２のモノリス触媒担体M1，
M2の外周面間を排ガスが流れないようにシール
する。 Also, between the rear outer periphery of the second monolithic catalyst carrier M2 and the body 1, there is asbestos, Interam (registered trademark name)
An elastic seal member 23 made of a heat-resistant material such as M 1 , etc. is interposed between the inner surface of the catalyst case C and the first and second monolithic catalyst carriers M 1 ,
Seal between the outer peripheral surfaces of M2 to prevent exhaust gas from flowing.
次に本考案の実施例の作用について説明する。
前述のように構成される触媒コンバータは、その
前部取付フランジ３をエンジンに連なる上流側排
気管に、またその後部取付フランジ５を排気マフ
ラーに連なる下流側排気管に接続して使用され
る。 Next, the operation of the embodiment of the present invention will be explained.
The catalytic converter configured as described above is used with its front mounting flange 3 connected to an upstream exhaust pipe connected to an engine, and its rear mounting flange 5 connected to a downstream exhaust pipe connected to an exhaust muffler.
エンジンから排出される有害成分を含んだ排ガ
スは先ず第１のモノリス触媒担体M1内に流入す
る。そしてこの触媒担体M1内では主として鉛化
合物等の固形有害成分が濾過除去される。 Exhaust gas containing harmful components discharged from the engine first flows into the first monolithic catalyst carrier M1 . Inside this catalyst carrier M1 , solid harmful components such as lead compounds are mainly filtered and removed.
固形有害成分を除去された排ガスは前記環状凹
陥部１０によつて形成される所定間隔の空隙部に
流れ、ここで乱流化された後、三元触媒である第
２のモノリス触媒担体M2内に流入し、ここで
CO，HC、およびNOx等の気体有害成分が酸化
および還元除去され、浄化後の排ガスは排気マフ
ラを通して大気へ放出する。 The exhaust gas from which the solid harmful components have been removed flows into the gaps at predetermined intervals formed by the annular recess 10, where it is made into a turbulent flow and then transferred to the second monolithic catalyst carrier M 2 which is a three-way catalyst. flows within, where
Harmful gaseous components such as CO, HC, and NOx are oxidized and reduced, and the purified exhaust gas is released into the atmosphere through the exhaust muffler.
而して第２のモノリス触媒担体M2内では、そ
の前方の第１のモノリス触媒担体M1により固形
有害成分を除去された排ガスが流入するので、そ
の目詰りが可及的に低減される。 Therefore, the exhaust gas from which solid harmful components have been removed by the first monolithic catalyst carrier M 1 in front of it flows into the second monolithic catalyst carrier M 2 , so that clogging thereof is reduced as much as possible. .
而して車両の走行による振動、衝撃等によつて
触媒ケースＣには曲げ力が作用するが、前記補助
片１４は上下方向（第１図ｘ方向）の曲げ強度を
高めることができる。尚、横方向（第２図ｙ方
向）の曲げ強度は前記ケース半体Ch，Chの接合
フランジ８，９によつて高められる。 Although bending force acts on the catalyst case C due to vibrations, impacts, etc. caused by the running of the vehicle, the auxiliary piece 14 can increase the bending strength in the vertical direction (x direction in FIG. 1). Incidentally, the bending strength in the lateral direction (the y direction in FIG. 2) is increased by the joining flanges 8 and 9 of the case halves Ch and Ch.
尚、上記実施例では触媒ケースＣ内には第１、
第２のモノリス触媒担体M1，M2を縦列収容した
場合を説明したが、そこにはモノリス触媒担体は
３つ以上縦列してもよく、また補強片１４は環状
凹陥部１０の何処に設けてもよく、最も曲げ強度
の低い部分に設けるのが望ましい。さらに触媒ケ
ース半体Ch，Chの凹陥半部１０ｈ，１０ｈには、
それぞれ一つの補強片１４を設けた場合を説明し
たが該補強片１４を、それぞれ複数個宛設けても
よい。 In the above embodiment, the catalyst case C includes the first,
Although the case where the second monolithic catalyst carriers M 1 and M 2 are housed in tandem has been described, three or more monolithic catalyst carriers may be arranged in tandem, and the reinforcing piece 14 may be provided anywhere in the annular recess 10. However, it is desirable to provide it at the part with the lowest bending strength. Furthermore, in the recessed halves 10h and 10h of the catalyst case halves Ch and Ch,
Although a case has been described in which one reinforcing piece 14 is provided in each case, a plurality of reinforcing pieces 14 may be provided in each case.
以上のように本考案によれば、所定の間隔を存
して縦列される複数個のモノリス触媒担体と、２
つのケース半体を合掌結合して構成され内部には
前記モノリス触媒担体を収容担持する触媒ケース
とよりなり、前記触媒ケースの長手方向中間部に
は、相隣れるモノリス触媒担体間に所定の間隔を
保たせしめるための環状凹陥部を一体に形成して
なる、多段型モノリス触媒コンバータにおいて、
前記環状凹陥部には、その環状凹陥部の底面より
外方に***して該環状凹陥部の相対向する両内側
面相互を一体に連結する補強片を継ぎ目無く一体
に形成したので、前記環状凹陥部の形状に起因し
て生じる触媒ケースの、該凹陥部近傍での曲げ強
度の低下分を、該凹陥部の相対向する両内側面相
互を結合一体化する前記補強片によつて十分に補
償することができ、従つて触媒ケースが該凹陥部
を屈折点として曲げ変形を起こすことを極めて効
果的に防止することができる。しかも上記補強片
には、触媒ケースの各ケース半体をプレス成形す
る際に環状凹陥部と共にケース半体に対し継ぎ目
無く同時一体成形することができるから、その加
工が頗る容易である上、部品点数を増加させるこ
とにもならず、コストダウンに大いひ寄与し得る
ものである。 As described above, according to the present invention, a plurality of monolithic catalyst carriers arranged in tandem with a predetermined interval;
It is constructed by joining two case halves together, and has a catalyst case that accommodates and supports the monolithic catalyst carrier inside, and a predetermined interval is provided between adjacent monolithic catalyst carriers in the longitudinal middle part of the catalyst case. In a multi-stage monolithic catalytic converter that is integrally formed with an annular recessed portion for maintaining
The annular recess is seamlessly formed with a reinforcing piece that protrudes outward from the bottom surface of the annular recess and connects the opposing inner surfaces of the annular recess. The decrease in the bending strength of the catalyst case near the recessed portion due to the shape of the recessed portion can be sufficiently compensated for by the reinforcing piece that connects and integrates both opposing inner surfaces of the recessed portion. Therefore, it is possible to very effectively prevent the catalyst case from being bent and deformed using the recessed portion as a bending point. In addition, the reinforcing piece can be seamlessly and integrally molded with the annular recess when each half of the catalyst case is press-molded, so the processing is extremely easy, and the parts This does not increase the number of points and can greatly contribute to cost reduction.
第１図は本考案モノリス触媒コンバータの縦断
面図、第２スペースはその平面図、第３図は、第
２図−線に沿う触媒ケースの断面図である。
Ｃ……触媒ケース、Ch……ケース半体、M1，
M2……第１、第２のモノリス触媒担体、１０…
…環状凹陥部、１４……補強片。
FIG. 1 is a longitudinal sectional view of the monolithic catalytic converter of the present invention, the second space is a plan view thereof, and FIG. 3 is a sectional view of the catalyst case along the line of FIG. 2. C...Catalyst case, Ch...Case half, M 1 ,
M 2 ...first and second monolithic catalyst carriers, 10...
...Annular concave portion, 14...Reinforcement piece.
Claims (1)
ス触媒担体M1，M2と、２つのケース半体Ch，
Chを合掌結合して構成され内部には前記モノリ
ス触媒担体M1，M2を収容担持する触媒ケースＣ
とよりなり、前記触媒ケースＣの長手方向中間部
には、相隣れるモノリス触媒担体M1，M2間に所
定の間隔を保たしめるための環状凹陥部１０を一
体に形成してなる、多段型モノリス触媒コンバー
タにおいて、前記環状凹陥部１０には、その環状
凹陥部１０の底面より外方に***して該環状凹陥
部１０の相対向する両内側面相互を一体に連結す
る補強片１４を継ぎ目無く一体に形成したことを
特徴とする、多段型モノリス触媒コンバータ。 A plurality of monolithic catalyst carriers M 1 , M 2 arranged in tandem with a predetermined interval, two case halves Ch,
Catalyst case C is formed by joining Ch in the palms of the hands and houses and supports the monolithic catalyst carriers M 1 and M 2 inside.
Therefore, an annular recessed portion 10 is integrally formed in the longitudinally intermediate portion of the catalyst case C to maintain a predetermined distance between adjacent monolithic catalyst carriers M 1 and M 2 . In the multi-stage monolithic catalytic converter, the annular recess 10 has a reinforcing piece 14 that protrudes outward from the bottom surface of the annular recess 10 and integrally connects both opposing inner surfaces of the annular recess 10 to each other. A multi-stage monolithic catalytic converter characterized by seamlessly integrated catalytic converters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1358584U JPS60125312U (en) | 1984-02-02 | 1984-02-02 | Multi-stage monolith catalytic converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1358584U JPS60125312U (en) | 1984-02-02 | 1984-02-02 | Multi-stage monolith catalytic converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60125312U JPS60125312U (en) | 1985-08-23 |
| JPH025053Y2 true JPH025053Y2 (en) | 1990-02-07 |
Family
ID=30497725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1358584U Granted JPS60125312U (en) | 1984-02-02 | 1984-02-02 | Multi-stage monolith catalytic converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60125312U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5612690A (en) * | 1979-07-13 | 1981-02-07 | Hitachi Ltd | Figure display |
-
1984
- 1984-02-02 JP JP1358584U patent/JPS60125312U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5612690A (en) * | 1979-07-13 | 1981-02-07 | Hitachi Ltd | Figure display |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60125312U (en) | 1985-08-23 |
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